Physics Gcse: Motion And Forces Flashcards
What is a scalar quantity?
Scalar quanties have SIZE and NO DIRECTION
Vector quantities have …
SIZE AND A DIRECTION
What is distance measured in ?
Meters (m)
Time is measured in what ?
S ( seconds )
What is speed measured in ?
M/s ( metres per second )
What is acceleration measured in ?
M/s2 ( metres per second squared )
What does v mean in the acceleration equation!
Final velocity
What does the u mean in the acceleration equation ?
Initial velocity
How do you work out Constant velocity ?
V2-u2=2 x a x X
Newtons 1st law ?
If there is no force acting on an object , the object won’t move UNTIL a force acts on it
How to work resultant force ?
Pushing forward force (20n) minus the force pulling it backwards (5n)
20n-5n=15 N
Newtons (n)
Newton’s second law ?
Force and direction are directly proportional
And acceleration and mass are directly unproportional
Mass is measured in what !
Kg
What is acceleration measured in ?
M/s2
Newtons 3rd law ?
When 2 objects interact, forces they exert on each other are equal but opposite
Weight means ?
Forces acting on different planets - e.g 10n on earth planet
W= m X a is for working out ..l?
The weight
What is velocity measured in ?
M/s
To work out the stopping distance you ?
Do ….. thinking distance + breaking distance
What can affect your breaking distance ?
Weather conditions , friction on the road
Mass means ?
How much stuff there is ?
What can affect your thinking distance ?
Being tried , drugs or alchohol
How to work out momentum ?
P= m x V
